#region The MIT License
// The MIT License
// 
// Copyright (c) 2009 octalforty studios
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#endregion
using System;
using System.Data.SqlClient;
using octalforty.Chinchillin.Actions.Util;

namespace octalforty.Chinchillin.Actions.Db
{
    [DbPlatform("sqlserver2008")]
    public class SqlServer2008Platform : SqlServerPlatform, IDbPlatformWithBackupSupport
    {
        public override DbConnectionInfo GetConnectionInfo(Uri serverUri)
        {
            var connectionInfo = base.GetConnectionInfo(serverUri);
            var uriBuilder = new UriBuilder(serverUri);

            //
            // If "Path" contains more than two "/" characters, we use all but the last part as server name.
            var serverName = uriBuilder.Path.CountOf('/') > 1 ?
                string.Format(@"{0}\{1}", uriBuilder.Host, uriBuilder.Path.SubstringBeforeLast('/').Substring(1)) :
                uriBuilder.Host;

            return new SqlServer2008ConnectionInfo(connectionInfo, serverName, uriBuilder.Port == -1 ? (int?)null : uriBuilder.Port);
        }

        #region IDbPlatformWithBackupSupport Members
        public void BackupDatabase(DbConnectionInfo connectionInfo, string backupResource)
        {
            var connectionString = connectionInfo.ToString();
            using(var sqlConnection = new SqlConnection(connectionString))
            {
                sqlConnection.Open();

                using(var sqlCommand = new SqlCommand("backup database [{0}] to disk = '{1}'".FormatWith(connectionInfo.DatabaseName, backupResource)) { CommandTimeout = (int)TimeSpan.FromMinutes(5).TotalSeconds })
                {
                    sqlCommand.Connection = sqlConnection;
                    sqlCommand.ExecuteNonQuery();
                } // using
            } // using
        }

        public void RestoreDatabase(DbConnectionInfo connectionInfo, string backupResource)
        {
            //
            // We cannot restore a database we're connected to, so connect to master instead.
            var sci = (SqlServer2008ConnectionInfo)connectionInfo;
            var ci = new SqlServer2008ConnectionInfo(sci.Login, sci.Password, sci.ServerName, sci.Port, "master");

            using(var sqlConnection = new SqlConnection(ci.ToString()))
            {
                sqlConnection.Open();

                using(var sqlCommand = new SqlCommand(@"alter database [{0}] set single_user with rollback immediate
restore database [{0}] from disk = '{1}' with replace
alter database [{0}] set multi_user".FormatWith(connectionInfo.DatabaseName, backupResource)) { CommandTimeout = (int)TimeSpan.FromMinutes(5).TotalSeconds })
                {
                    sqlCommand.Connection = sqlConnection;
                    sqlCommand.ExecuteNonQuery();
                } // using
            } // using
        }
        #endregion
    }
}